The Summer '10 release of the Force.com IDE is now available!  Check out the following new features:

• Downloadable Installers
• • Installing the Force.com IDE is easier than ever. Download the Force.com IDE Installer for Windows, Mac, or Linux to get started with Eclipse 3.5 and the Force.com IDE.
• New Metadata Support in Summer '10
• • Remote Site Settings
  • Article Types
  • Article Type Layouts
  • Enhancements to Dashboards and Profiles.
• Documentation and User Assistance
• • Read and search all Force.com Summer '10 technical documentation from within Eclipse online help.

To get started, visit the installation page.